docs: def get_return_description_indexes(self, data):
          """Get from a docstring the return parameter description indexes.
          In javadoc style it is after @return.
  
          :param data: string to parse
          :returns: start and end indexes of found element else (-1, -1)
            Note: the end index is the index after the last included character or -1 if
            reached the end
          :rtype: tuple
  
          """
          start, end = -1, -1
          stl_return = self.opt['return'][self.style['in']]['name']
          if self.style['in'] in self.tagstyles + ['unknown']:
              idx = self.get_key_index(data, 'return')
              idx_abs = idx
              # search starting description
              if idx >= 0:
                  # FIXME: take care if a return description starts with <, >, =,...
                  m = re.match(r'\W*(\w+)', data[idx_abs + len(stl_return):])
                  if m:
                      first = m.group(1)
                      idx = data[idx_abs:].find(first)
                      idx_abs += idx
                      start = idx_abs
                  else:
                      idx = -1
              # search the end
              idx = self.get_elem_index(data[idx_abs:])
              if idx > 0:
                  idx_abs += idx
                  end = idx_abs
  
          if self.style['in'] in ['params', 'unknown'] and (start, end) == (-1, -1):
              # TODO: manage this
              pass
  
          return start, end